Logging system



v 1,642,568- Sept. 13,1927. L UYLER LOGGING SYSTEM Filed July 23, 1923 2Sheets-Sheet 1 1,642,568 P 1927' 1.. TYLER LOGGING SYSTEM Filed July 23,1923 2 Sheets-Sheet 2 is under a heavy strain and continuous wearPatentetl sept 13, 1927.

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r f LOGGING sYs'r'E Ap ucatioamea uly 23,1923 Serial my. 653,197; 9.

This invention relates to systems of cableways usedin transportingdogsand other which,

[forest it is most convenient to transport and collectthe logs at asingle terminalpbut, in,

heavy objects and has special reference" to the invention are toproviders logging system by which a largearea may be loggedeiff with theminimum of expense; to "provide means for shifting the track line ofsuch system ma series of positions radiating from pickedup at any pointin the area and 'carried to said-central'point'; and to provide a safetymeans wherebythe carriage is "pre- "vented from running away down the''grade; *ofthe track'lineif the lifting line should' breakr" I attainthese and other object-sby thede vices, mechanisms, and arrangementsillustrated'in the accompanying drawings,in

Fig; 1 is a perspective View showing my logging systemin operation';'Fig. 2 is a similar view of a portion thereof showing the safety devicein actionyandFig. 3 is'alarger view of the carriageand its 'conn'ect-'in parts. S1m1lar numerals of-reference re er'to similar partsthroughoutthe several In clearing the timber from a tract of ordinarycableway systems, it is not possible toelear a tract at any great'distance on either side of the track cable, orsky'line, so that eitherthe outer end of the track cable has to be taken down and re-erected agreat I many times or the outer fringe of the area is likely to beincompletely cleared. Further, in rough country it is quite common'tohave the sky line at a considerable grade, even as much as 3000 feettothe mile and, since the line may be from 1000 feet to 00 feetlong andthe loads transported Weigh 111713040000 pounds, 'it is evident thatthe'liftingcable with the result that it may, at times, break.

Now, the upgrade haul cable isusually atinvented the followingdescribedapparatus 7 wherein the sky line may be shifted as much systems whichtransport" the logs from a wide area to a fixed point." The ob ects ofdismantle it on onef e and re erect it on,

' 1,642,568 FICE,

anotherg wherein its length may be slightly ingline breaks.

adjusted; andwherein an emergency or safe-. ty device is provided whichwill prevent "the v {carriage from runningaway when theilift- A .za-icentral point, whereby the logs may be Referring to the drawings, itwillbe seen minal of the system, and .the logging" or j that the spartree'l forms thereceivingter- V donkey'engine is located nearby. Thisen-- gine lsrepresented on the drawing by the three drums 2, 3e and4:.which actuate respectively the lifting cable 5, the haul-in line 6 vand theout-haul line-'7 All of thesecables pass from their respectivedrumsthrough' suitable sheaves mountedon the central" or terminal spartree 1; The track cable 8 is also passed througha sheave secured to thesaid spar tree 1'. The inner end oft-his cable 8, is'secured to a block9 and is tightened by means of a suitable tackle 10 anchored toa;

stump '11, or other object. This inner end'is therefore adjustable andpermits a. slightas well as a change in tautness. a

' The outer end of'the track cables is se-i cured to a hangingmechanism, represented diagrammatically by the plate 12, and the outerend of "the lifting line '5 is also atchange in the'working-length-ofthe cable 8 tached to the'same plate 12. This plate is supported by twosets of tackles 13 and 14 connecting it totwoput'er spar trees 15 and16.- The tackle cables 17 are fastened tothe plate '12 at 18 and pass inbot-h directions therefrom through the sheaves 19 and 20 on the trees 15and 16 respectively, and the; sheaves 21 on the plate 12,"to form boththe said tackles 13 and 14:, and pass therefrom through the 'basesheaves22 and the guide sheaves 23' to a pointnear the 'spar'tree'l. They aresecured together to form one continuous cable which passes around theend pulley 24 which is anchored to a suitable stump 25, orother object,by a tackle 26. The twosides of the cable'17, near the pulley'24, aresecured together by a suitable removable clamp 27. Thus it is seen thatwhen th'e'c'able-17 is adjusted as to length and tautness and is clampedas above, the

dependent on the adjustment of the cable 17 in the tackles and 14leading to the spar trees 15 and l6. 1 lso, it is seen that it may hequickly shifted laterally to any point between the radii leading to thesaid trees by simply releasing; the clamp 27 and pulling on the cable 17on one side or the other of the pulley 52-1: thus drawing the plate 12nearer to one or the other of: said trees. Adjustment of the tautness ofsaid cable 17 may be made by the tackle Q6.

\Vhen the area between the radii to the two trees l5 and 16 is properlycleareih then the tackle l3 from the spar tree lo may he removed andattached to some other spar tree. such as 28., and the area between theradii leading to the trees 16 and 28 may then be similarly cleared.However, no time is lost in the use of the track cable 8 while thischange is being made because the tackle 14 then supports its outer endand it lies on the radius to the tree 1b.

The load transporting system comprises the sky line 8. on which acarriage 29 rides,

a lifting line 5. haul-in line 6 and out-haul line 7. The carriage 99 isprovided with a pair of track sheaves 30 which t'avel on the cable 8 andwith one or more keeper sheaves 31 engaging: the under side of saidcable to prevent lthe carriage from leaving the track. It also has apair of lifting-cable sheaves 2-12, offset with relation to each other.The li'ltine' cable 5 passes beside one said sheaves 39, turns down overthe other said sheaves passes around the main or block sheave 33 and upand around the first said sheave 32. Thus the said cable 5 is bent inthe same direction as it engages the two sheaves 32 and the block sheave33, thus eliminating): a large amount of the wear on said cable whichwould occur if it- Were bent in the usual way in opposite directions onthe sheaves 3;} and 32. The load 34 is attached to the block sheave 33by a suitable sling 35. The ends at the haul-in cable 6 and the out haulcable 7 are also attached to the block sheave 33. It will therefore beunderstood that the position of the carriage on the track cable 8 iscontrolled by the said rabies 6 and 7 and that the height of the loadrelatively to the carriage is controlled by the tension in the liftingcable 5.

I also provide a safety cable 36 which is attached to the haul-in cable6 at a point somewhat removed trom the block sheave and which isthreaded between the sheave 37 and its 'ianie 38. This frame 3 ismounted on or att-q bed to a convenient part of the carriage ill). Theother end of the cable 36 attached to a sheave 39 which rides freely onthe lifting cable I prefer to provide a weight, such as a length ofchain 40, to keep the sheave 39 upright and to draw the cable Elt'lthrough the sheave 3'7 as the load 3% raised. This safety cable isnormally without function and is arranged as described in order to hekept out of the way as much as possible and yet be always ready for theemcrgenov when it occur Now. should the cable 5 break. the oad and theblock 35) would inunediatc v drop to the ground (Fig. 52) carrvhnr theends of the cables 6 and 7 with them. The cable 5, now broken. would bepulled out i? the carriage 29 and the carriae'e would then he tree torun away down the cable R. lint. with the safety cable in place as abovedescribed. the sheave 35) is drrnipiul by the cable I? when it breaksand the lower end of the safety cable 36 also drops with the oad and thecables 6 and 7. riage starts to run it: draws the sheave 37 along thesafety cable 36 until the sheave 39 or the chain ll) engages the frame38 thereof. As neither the chain 4:0 nor the sheave 30 will. passthrough the opening be tween the frame 38 and the sheave 37 it isevident that the said satcty cable 36 will hold the carriage 29 tram't'urther movement down the grade through the drae of the.

load on the ground and the tension of the out-haul cable 7 to which itis connected through the block cable 6. l

Having described my inventimnwhat I claim is 1. In a cableway system thecombination oi a central spar tree: two outer spar trees; a track cablesupported at one end by the central spar tree and. iuljiustablysupported at the other end by both said outer spar trees, whereby saidtrack cable may extend in any radial direction from the central spartree towards the space between the outer spar trees; and means toradjusting the outer end oi the track cable whereby the and a shortportion oil? the tension thereof is adjusted without altering itsworking length or position.

2 In a eableway system, the cou'ibination ot a central spar tree; twoouter spar trees; a track cable supported at one end by said centralspar tree; and. supporting cables attached to and leading from the outerend of the track cable to said two outer spar trees respectively. saidcal'iles being: connected together to ['orni one continuous cablewhereby loosening, one cable will lighten the other cable and move theouter end of the track cable towards said tightened cable.

3. In a cahleway system, the combination of a central spar tree: twoouter spar trees; a track cable supported at one end by said centralspar tree; and su iiporl inc cables attached to and leading from theouter end of the track cable to said two outer spar trees respectively,and extendingfrom the respective outer spar trees to a point adjacentthe central spar tree and being connected together to term onecontinuous cable 'lheretore when the can track cable may be adjusted.

4. In a. cableway system the combination of a central sparjtree"; twoouter spar trees; a track cable supported at one end by the central spartree; a sheave anchored at a point adjacent said central spar tree; andadjustable means supporting the outer end of the track cable from bothsaidouter spar trees, whereby said track cable may extend in'any radialdrection from the central spar tree towards the space between the outerspar trees, "said adjustable supporting means comprising cables leadingfrom said outer end to said spar trees respective1y, V

said cables being connected together to form one continuous cable whichextends from' both said spar trees to and around said the last namedcable together on each side of Y said sheave, whereby the accidentaladjustment of the supporting means is prevented. 6. A cableway system asset forth in claim 4, tog-ether with an adjustable means connecting thesheave to its anchor.

LEWVIS L. TYLER.

